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Comment by dsr_ | Hacker News Reader

It's an external filter, you can run it from emacs.

shell-command-on-region, IIRC.

Thank you for that. I figured Emacs would permit use of external filters, glad to know the actual incantation.

The keyboard shortcut is M-|

If you want to replace a section of text, not just see the output in another buffer, use C-u M-|

Yes, that's it exactly.

I’m not an emacs user but that gives me strong powershell vibes! (Not a derogatory remark.)

M-x eshell

  Welcome to the Emacs shell
  
  /tmp $ set-variable `x 6; echo $x
  6
  /tmp $

M-: (term "pwsh")

  PowerShell 7.4.0
  PS /tmp> set-variable `x 6; echo $x
  6
  PS /tmp>

Disturbing.